Flue-stop.



L. B. GROUT.

FLUE STOP.

APPLICATION FILED 00T.25,1913.

1,1 1 Q, 1 1 3 Patented Sept. 8, 1914.

El W's/z 507v THE NORRIS PETERS 60., PHOTO-Linda. WASHINGTON, u. C.

UNITED STATES PATENT OFFICE.

LEWIS B. caonr, or OGDEN, UTAH, ASSIGNOR or ONE-HALF T0 nouns. L. comma, or oennn, UTAH.

ELITE-STOP.

Specification of Letters Patent.

Patented Sept. 8, 1914.

Application filed October 25, 1913. Serial No. 797,248.

To all whom it may concern:

Be it known that I, LEWIS B. GROUT, a citizen of the United States, residing at Ogden, in the county of Weber and State of Utah, have invented new and useful Imrovements in Flue-Stops, of which the following is a specification.

This invention relates to the class of chimney-flue stops comprising a circular sheet metal plate designed to be placed in or over the inlet of the flue and provided with a peripheral collar adapted to lie against the wall of the room from which the flue extends, said stops being used, as is well known, for the purpose of excluding soot and dust from the room when a stove-pipe has been removed from the flue.

The main object of the present invention is to provide a stop having a separable collar which may beused independently of the closing-plate, wherein it may be applied to a stove-pipe in the well known manner.

A further object of this invention is to provide simple, inexpensive and efflcient means for attaching the said collar to the usual flue-thimble, whereby the same can be readily removed when required and which shall serve to securely hold the circular plate to effectually close the entrance of the fine so as to prevent escape of soot and dust therefrom.

To that end the invention resides in the combination with the flue-thimble, of a flue stop comprising a separable plate and collar, and means for detachably clamping, said parts to the thimble.

The invention furthermore consists in the novel construction and arrangement of the clamping devices in combination with the separable collar and flanged thimble, whereby the said collar securely retains the circular plate or flue-stop proper in position.

The invention also consists of certain novel details of construction as will be hereinafter fully described and set forth in the claims.

In the accompanying drawings Figure 1 is a transverse sectional view of my combined flue-stop and stop-pipe collar applied to the usual thimble inserted in a chimneyflue; Fig. 2 is an outer face view of the same; Fig. 3 is a vertical section on the line Xf in Fig. 1; Fig. 4: is an enlarged fragmentary view showing more clearly one of the clamping devices applied to the flange of the thimble for engaging the collar; and, Fig. 5 is a vertical section on the line -YY in Fig. 4.

Like characters of reference indicate like parts in the several views of the drawings.

-A denotes a portion of a chimney which is provided with the usual horizontal flue B, and O denotes a sheet metal thimble fitted tightly within the flue to receive the ordinary stove-pipe indicated by dotted lines in Fig. 1. 1n theipresent 'instance this thimble protrudes at the front end of the flue for a short distance and has its protruding end formed with a plain outwardly extending peripheral flange 1-, between which flange and opposed face of the wall or chimney is provided a clearance to accommodate the collar-clamps as illustrated in Fig. 1.

2 denotes a circular sheet metal plate which constitutes the flue-stop proper, and 3 indicates the separable sheet metal collar which is designed to be attached remov ably to the flange l of the thimble to securely hold the plate 2 over the entrance of the flue and also designed to be used in connection with the stove-pipe when the plate is removed.

The marginal portion of the plate 2 is deflected as indicated at 4 to produce an annulus which bears against the outer face of the flange 1, and thus the main portion thereof is projected from the plane of said face. This deflection also produces an annular shoulder 5 which is seated in a correspondingly shaped recess 6- formed by a reverse deflection of the. inner marginal portion of the collar 3, between which collar and aforesaid flange the plate is securely held and interlocked with the collar incident to drawing the collar against the flange by the clamping devices sustained on the said flange.

The collar -3 is shaped concavo-convex in cross-section as usual and has its outer marginal portion deflected to present a flat bearing surface -7 to the wall, and adjacent to the marginal portion of the plate -2 the said collar is provided with a series of uniformly spaced apertures 88 which are elongated and adapted to receive therethrough spring-pressed locking-tongues -99 which are pivotally mounted on the flange l of the thimble, whereby the collar is firmly clamped to the flange. Each of these locking-tongues is pivoted at one end to a base-plate -l0- which is riveted or otherwise secured to the inner face of the flange. Elie attaching end portion of the tongue 9- is curved substantially U- shape to pass over the edge of the plate -2 and this le -shape portion extends through the aperture -8 when the tongue is swung to clamping position wherein lts free end bears firmly against the outer face of the collar, a a result of spring-action to which the pivotal end portion of the tongue is subjected. To effect a pivotal engagement of the tongue with the aforesaid plate 10-, the latter is formed with two parallel outward extensions 1l-1lprojecting beyond the periphery of the flange and each folded back upon itself, the main portions of the said extensions being pressed away from the overlying port-ions, as indicated at 12 12, to form the pivots for oppositely projecting studs -13-13 formed on the side edges of the tongue -9-. The tongue extends a short distance beyond its pivots and bears upon a spring-lip laprojecting from the base-plate -10 and disposed intermediate the extensions 11- 11. The pressure of the tongueextension on the lip l%t causes the free end of the tongue to spring against the collar 3- when it is swung rearwardly to a predetermined degree and thus the collar is securely clamped in position to retain the plate 2. The said spring-lip also serves to throw the tongue outwardly when it is swung sufliciently to release the collar so as to permit the tongue to pass through the aperture 8- whereby the collar and plate Q-- can be readily removed, as clearly represented by dotted lines in Fig. 1. It will be evident that when the plate is removed, the cellar may be used in connection with a stove-pipe in the usual way.

I do not limit myself to the specific form of clamping device herein shown and described, as the same is subject of various modifications without departing from the spirit of the invention.

l V hat I claim as my invention, and desire to secure by Letters Patent is 1. In a chimney-due stop, the combination with a thimble held firmly within the flue and having its forward end protruding therefrom and formed thereat with an out wardly projecting peripheral flange, a circular tlueclosing plate bearing with its marginal portion against the front face of the flange, a separable retaining collar enibracing the marginal portion of the plate and provided with a series of apertures, and a series of separately operated tongues pivotally connected to the said flange and adapt ed to pass through the apertures independently of the plate to lock the collar detachably to the flange as set forth.

2. In a flue-stop, the combination with a thiinble having its forward end protruding from the fine and formed thereat with an outwardly projecting flange, a circular flueclosing plate having its marginal portion bearing against the front face of the flange, a separable collar embracing the marginal portion of the plate and formed at its inner marginal portion with an annular recess interlocked with a correspondingly formed shoulder on the plate, said collar being provided with a series of uniformly spaced apertures, a plurality of clamps each consisting of a base-plate attached to the rear face of the flange and formed with a spring lip, and. a tongue pivot-ed at one end to the baseplate to bear on the springdip and adapted to pass threughan aperture in the collar, whereby its free end portion is caused by the action of the spring-lip to bear on the outer face of the collar as set forth LElVIS B. CRQUT. l l itnesses C. V. ZINN, J. C. ROBERTS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01' Patents. Washington, D. G. 

